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DBJ-003
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DABUND
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Copper
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1M - 50M
Material
Color
Keywords
Application
1/4" x 3/8" x 75 ft Insulated Copper Pipe for Mini Split HVAC Systems
The DABUND 1/4" x 3/8" x 75 ft insulated copper pipe is designed for long-distance mini split, HVAC, heat pump, and refrigeration installations. It provides efficient refrigerant flow, durable insulation protection, and energy-saving performance for residential and light commercial air conditioning systems.
This pre-insulated HVAC copper line set includes a 1/4" liquid line and a 3/8" suction line. The 75 ft length supports flexible indoor-to-outdoor routing while reducing additional joints and helping minimize refrigerant leakage risks.
Product Overview – 75 ft Pre-Insulated Copper Line Set
This insulated copper pipe is a ready-to-install solution for HVAC professionals, contractors, distributors, and project buyers. It combines premium copper tubing with factory-applied insulation to improve installation efficiency and long-term HVAC reliability.
Liquid line: 1/4" / 6.35 mm
Suction line: 3/8" / 9.52 mm
Length: 75 ft / 22.86 m
Material: 99.9% pure copper
Structure: twin insulated copper pipes
Application: mini split, HVAC, heat pump, and refrigeration systems
The 1/4" x 3/8" configuration is commonly used for 9,000–12,000 BTU mini split systems, depending on the HVAC equipment manufacturer’s installation requirements.
High-Purity Copper Tubing Built for Reliability
99.9% Pure Copper Meets ASTM Standards
Manufactured using C12200 copper, this tubing can comply with ASTM B280 requirements according to product specification. It provides stable refrigerant flow, excellent thermal conductivity, and strong corrosion resistance for HVAC and refrigeration systems.
Excellent thermal conductivity
Strong corrosion resistance
Long service life in HVAC systems
Reliable refrigerant transmission for mini split systems
High Pressure Resistance for Modern Refrigerants
With a pressure rating range of 2100–7000 PSI according to specification, this copper pipe can support high-pressure refrigerants such as R410A when the pipe size, wall thickness, pressure rating, line length, and equipment requirements match.
Advanced Insulation Technology for Energy Efficiency
UV-Resistant and Weatherproof Insulation
The insulation is made from high-density polypropylene, PE, or rubber material according to selected specification. It is designed for outdoor installations, UV resistance, moisture control, and stable thermal performance.
UV resistance for outdoor installations
Flame-retardant insulation option, including UL94-related requirements according to specification
Temperature range from -40°C to 120°C
Suitable for indoor concealed runs and outdoor exposed line routes
Thick Insulation Layer for Thermal Protection
The insulated copper pipe can be supplied with approximately 1/2" insulation thickness depending on specification. The insulation layer helps minimize heat loss, maintain refrigerant temperature stability, and improve system efficiency.
Moisture and Condensation Protection
The closed-cell insulation structure acts as a barrier against water penetration, condensation buildup, mold risk, and corrosion-related damage around the copper pipe.
99.9% Pure Copper
Black Rubber Insulated Pipe
Plastic Cap Protection
Pipe Insulation Tubing Features
The black rubber insulation option provides reliable thermal protection and moisture condensation control. The insulation material can work as both the insulation layer and the moisture-proof layer, reducing the need for an additional vapor permeation protective layer in many HVAC applications.
Material option: black rubber insulation
Temperature range: -40°C to 120°C
Moisture condensation protection
Thermal insulation and moisture-proof function in one structure
Key Benefits of 75 ft Insulated Copper Pipe
Ideal for Medium to Long Distance Installations
The 75 ft length is suitable for multi-room residential systems, rooftop HVAC units, and complex installation layouts. Reducing joints means fewer leak points and better reliability.
Optimized for Small HVAC Systems
The 1/4" + 3/8" configuration is widely used for 9,000 BTU and 12,000 BTU mini split systems, as well as 0.75–1.0 ton HVAC systems, when specified by the equipment manufacturer.
Improved Energy Efficiency and Lower Operating Cost
Pre-insulated tubing reduces unnecessary heat exchange, helping your HVAC system maintain refrigerant temperature and operate more efficiently.
Easy Installation and Reduced Labor Cost
Factory-applied insulation eliminates the need for additional wrapping, saving installation time and improving insulation consistency.
Durable, Corrosion-Resistant and Long-Lasting
Copper’s natural corrosion resistance supports long service life when properly installed and used under suitable HVAC operating conditions.
HVAC Applications and Wide Compatibility
This 1/4" x 3/8" insulated copper pipe is suitable for multiple HVAC and refrigeration applications when the line size, installation length, refrigerant type, and equipment requirements match.
Ductless mini split systems
Heat pump systems
Central air conditioning systems
Refrigeration applications
Residential and light commercial HVAC installations
Technical Specifications
| Feature | Details |
|---|---|
| Product Name | 1/4" x 3/8" x 75 ft Insulated Copper Pipe |
| Product Type | Pre-insulated mini split HVAC copper line set |
| Length | 75 ft / 22.86 m |
| Liquid Line | 1/4" / 6.35 mm |
| Suction Line | 3/8" / 9.52 mm |
| Material | 99.9% pure copper |
| Insulation Thickness | Approx. 1/2" according to selected specification |
| Insulation Type | UV-resistant polypropylene / rubber insulation |
| Temperature Range | -40°C to 120°C |
| Pressure Rating | 2100–7000 PSI according to specification |
| Standards | ASTM B280, C12200, UL94, ASTM E84 according to selected specification |
OEM Customization and Manufacturing Capabilities
DABUND supports OEM and ODM services for HVAC distributors, wholesalers, contractors, importers, and private label brands that need customized insulated copper pipe solutions.
Custom insulation colors, including black and white
Logo printing on insulation
Custom lengths from 15m to 50m or more
Custom pipe size combinations
OEM and ODM manufacturing services
Private label packaging for distributors
Insulated Copper Pipe Size Options
| Size | Length | Insulation Black Rubber | Flame Resistant |
| 1/4 + 3/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 1/2 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 5/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 5/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 3/4 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/2 + 3/4 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 7/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
Line Set Size and HVAC Capacity Reference
| Line Set Size | Common Ton / HP Range | Common BTU Range | Typical Application |
|---|---|---|---|
| 1/4 + 3/8 | 0.75 ton – 1.0 ton / 0.75P – 1P | 9000–12000 BTU / 9K–12K | Small mini split air conditioner |
| 1/4 + 1/2 | 1.5 ton – 2.0 ton / 1.5P – 2P | 12000–18000 BTU / 12K–18K | Medium mini split air conditioner |
| 1/4 + 5/8 | 2.0 ton – 2.5 ton / 2P – 2.5P | 24000–30000 BTU / 24K–30K | Split AC and heat pump system |
| 3/8 + 5/8 | 3.0 ton – 4.0 ton / 3P – 4P | 36000–48000 BTU / 36K–48K | Ductless commercial air conditioner |
| 3/8 + 3/4 | 4.5 ton – 6.0 ton / 4.5P – 6P | 54000–72000 BTU / 54K–72K | Large split AC installation |
| 3/8 + 7/8 | 6.0 ton – 8.0 ton / 6P – 8P | 72000–96000 BTU / 72K–96K | High-capacity ductless HVAC system |
Why Choose DABUND Insulated Copper Pipe?
DABUND provides a one-stop HVAC solution for distributors, contractors, and OEM buyers. With in-house copper and insulation production, DABUND supports stable quality, flexible customization, and global export supply.
15+ years of HVAC manufacturing experience
In-house production for copper and insulation
Weekly global shipments
Strict international quality standards
Competitive factory pricing
OEM and ODM support for private label buyers
DABUND Factory
We produce insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC customers.
SGS Certificate
DABUND mini split line set insulation can be made of polypropylene or black rubber with UV resistance and can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 standards according to product specification.
Exhibition
DABUND joins HVAC exhibitions worldwide to help customers evaluate mini split line sets, insulated copper pipes, HVAC copper line sets, and HVAC parts face to face.
FAQ
What is a 1/4" x 3/8" x 75 ft insulated copper pipe used for?
This copper pipe is used to connect indoor and outdoor units in mini split and HVAC systems, enabling efficient refrigerant circulation over longer distances.
What size HVAC system is this line set suitable for?
The 1/4" + 3/8" configuration is typically used for 9,000–12,000 BTU systems or 0.75–1.0 ton systems, making it suitable for many residential mini split applications.
Why choose a 75 ft line set instead of shorter options?
A 75 ft line set allows greater installation flexibility and reduces the need for additional connections, helping minimize leakage risks in medium to long distance installations.
Is this copper pipe compatible with R410A refrigerant?
Yes. It can support high-pressure refrigerants such as R410A when the copper size, wall thickness, pressure rating, line length, and HVAC system requirements match.
What type of insulation is used in this product?
It uses UV-resistant polypropylene, PE, or rubber insulation with a closed-cell structure, providing thermal insulation, moisture protection, and outdoor durability according to selected specification.
Can this insulated copper pipe be used outdoors?
Yes. The UV-resistant and weatherproof insulation makes it suitable for outdoor installations in demanding HVAC environments.
What are the advantages of pre-insulated copper pipes?
Pre-insulated copper pipes save installation time, improve insulation consistency, reduce energy loss, and help prevent condensation issues.
Can I customize this copper pipe for my brand?
Yes. OEM and ODM services are available, including custom branding, insulation color, logo printing, pipe marking, custom length, and packaging customization.
How long does an insulated copper pipe last?
With proper installation and suitable operating conditions, insulated copper pipes can provide long service life because of copper’s corrosion resistance and durable insulation protection.
Who should buy this 75 ft 1/4" x 3/8" insulated copper pipe?
It is suitable for HVAC contractors, mini split installers, distributors, wholesalers, importers, refrigeration project buyers, and private label HVAC brands.
